18 relations: Cartesian product, Communications of the ACM, Comparison sort, Computer science, Elwyn Berlekamp, Fare, Fast Fourier transform, Integer sorting, List of unsolved problems in computer science, Michael Fredman, Non-constructive algorithm existence proofs, Ordered pair, Random-access machine, Shortest path problem, Sorting algorithm, Time complexity, Word (computer architecture), 3SUM.

## Cartesian product

In set theory (and, usually, in other parts of mathematics), a Cartesian product is a mathematical operation that returns a set (or product set or simply product) from multiple sets.

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## Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

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## Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

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## Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

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## Christmas traditions

Christmas traditions vary from country to country.

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## Communications of the ACM

Communications of the ACM is the monthly journal of the Association for Computing Machinery (ACM).

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## Comparison sort

A comparison sort is a type of sorting algorithm that only reads the list elements through a single abstract comparison operation (often a "less than or equal to" operator or a three-way comparison) that determines which of two elements should occur first in the final sorted list.

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## Computer science

Computer science deals with the theoretical foundations of information and computation, together with practical techniques for the implementation and application of these foundations.

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## Elwyn Berlekamp

Elwyn Ralph Berlekamp (born September 6, 1940) is an American mathematician.

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## Fare

A fare is the fee paid by a passenger for use of a public transport system: rail, bus, taxi, etc.

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## Fast Fourier transform

A fast Fourier transform (FFT) is an algorithm that samples a signal over a period of time (or space) and divides it into its frequency components.

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## Integer sorting

In computer science, integer sorting is the algorithmic problem of sorting a collection of data values by numeric keys, each of which is an integer.

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## List of unsolved problems in computer science

This article is a list of unsolved problems in computer science.

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## Michael Fredman

Michael Lawrence Fredman is an emeritus professor at the Computer Science Department at Rutgers University, United States.

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## New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

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## New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

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## New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

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## Non-constructive algorithm existence proofs

The vast majority of positive results about computational problems are constructive proofs, i.e., a computational problem is proved to be solvable by showing an algorithm that solves it; a computational problem is shown to be in P (complexity) by showing an algorithm that solves it in time that is polynomial in the size of the input; etc.

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## Ordered pair

In mathematics, an ordered pair (a, b) is a pair of objects.

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## Random-access machine

In computer science, random-access machine (RAM) is an abstract machine in the general class of register machines.

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## Shortest path problem

In graph theory, the shortest path problem is the problem of finding a path between two vertices (or nodes) in a graph such that the sum of the weights of its constituent edges is minimized.

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## Sorting algorithm

In computer science, a sorting algorithm is an algorithm that puts elements of a list in a certain order.

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## Time complexity

In computer science, the time complexity is the computational complexity that describes the amount of time it takes to run an algorithm.

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## Word (computer architecture)

In computing, a word is the natural unit of data used by a particular processor design.

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## 2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

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## 2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

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## 3SUM

In computational complexity theory, the 3SUM problem asks if a given set of n real numbers contains three elements that sum to zero.

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